7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7
TABLE OF CONTENTS
1. OVERVIEW ....................................................................................................................................... 1
2. INSTALLATION ................................................................................................................................. 3
2.1. OPTICAL CONNECTIONS ....................................................................................................... 3
2.1.1. Single Fiber Versions ..................................................................................................... 4
2.1.2. Standard Dual Fiber Version (-F2 version) ..................................................................... 4
2.2. SIGNAL CONNECTIONS ......................................................................................................... 5
2.2.1. Audio Connections ......................................................................................................... 8
2.2.2. Data Connections .......................................................................................................... 8
2.2.3. GPIO Connections ......................................................................................................... 8
2.3. CARE AND HANDLING OF OPTICAL FIBER .......................................................................... 9
2.3.1. Safety ............................................................................................................................ 9
2.3.2. Assembly ....................................................................................................................... 9
2.3.3. Labeling ......................................................................................................................... 9
2.3.4. Handling and Connecting Fibers .................................................................................. 10
3. SPECIFICATIONS ........................................................................................................................... 11
3.1. ANALOG AUDIO .................................................................................................................... 11
3.1.1. Balanced/Matrix Type Audio ........................................................................................ 11
3.1.2. Unbalanced/Party-Line Type Audio ............................................................................. 11
3.2. SERIAL DATA ........................................................................................................................ 12
3.3. OPTICAL INPUT/OUTPUT ..................................................................................................... 12
3.4. GENERAL PURPOSE OUPUTS (GPO) ................................................................................. 12
3.5. GENERAL PURPOSE INPUTS (GPI) ..................................................................................... 13
3.6. ELECTRICAL .......................................................................................................................... 13
3.7. PHYSICAL .............................................................................................................................. 13
4. CARD-EDGE MONITORING AND CONTROL ................................................................................ 14
4.1. STATUS INDICATOR LEDS ................................................................................................... 14
4.2. CARD-EDGE DISPLAY AND CONTROLS ............................................................................. 15
4.2.1. Card-Edge Display Warning Indications ...................................................................... 17
4.2.2. Displaying the Optical Power ....................................................................................... 17
4.2.3. Selecting the Signal Status Indication Mode ................................................................ 17
4.2.4. Selecting an Interface Profile ....................................................................................... 18
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7
4.2.5. Setting the Party-Line Audio Null Level (Future) .......................................................... 19
4.2.6. Setting the Analog Audio Detection Threshold............................................................. 21
4.2.7. Setting the Audio Gain ................................................................................................. 21
4.2.8. Selecting the Serial Data Termination.......................................................................... 22
4.2.9. Selecting the Serial Data Failsafe Bias ........................................................................ 23
4.2.10. Selecting the RS485 Serial Data Rate ......................................................................... 24
4.2.11. Global Control .............................................................................................................. 26
5. GENERAL PURPOSE INPUTS AND OUTPUTS ............................................................................. 27
6. JUMPER CONTROLS ..................................................................................................................... 28
6.1. SELECTING THE CARD ID .................................................................................................... 28
6.2. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED BY THE GLOBAL FRAME
STATUS .................................................................................................................................. 28
6.3. CONFIGURING THE MODULE FOR FIRMWARE UPGRADES ............................................. 28
7. VISTALINK® REMOTE MONITORING/CONTROL .......................................................................... 29
7.1. WHAT IS VISTALINK®? ......................................................................................................... 29
7.2. VISTALINK® MONITORED PARAMETERS ........................................................................... 29
7.3. VISTALINK® CONTROLLED PARAMETERS ......................................................................... 30
7.4. VISTALINK® TRAPS ............................................................................................................... 30
7.5. VISTALINK® CONFIGURATION ............................................................................................. 30
7.5.1. Control Settings ........................................................................................................... 30
7.5.1.1. Profile Settings .............................................................................................. 31
7.5.1.2. Optical Control ............................................................................................... 32
7.5.1.3. Audio Detection Threshold Settings ............................................................... 32
7.5.1.4. Audio Gain Settings ....................................................................................... 33
7.5.2. Data Control ................................................................................................................ 33
7.5.2.1. Data Termination Status ................................................................................ 33
7.5.2.2. Data Fail Safe Bias Status ............................................................................. 34
7.5.3. Monitor ........................................................................................................................ 34
7.5.3.1. Card Configuration Monitor ............................................................................ 34
7.5.3.2. Optical Monitor ............................................................................................... 35
7.5.3.3. Data Input & Output Status ............................................................................ 35
7.5.3.4. Audio Input & Audio Output Status ................................................................ 35
7.5.3.5. Faults ............................................................................................................. 35
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7
Figures
Figure 1-1: 7707IT Block Diagram ......................................................................................................................... 2
Figure 2-1: 7707IT Rear Panel .............................................................................................................................. 3
Figure 2-2: Terminal Block Wiring ......................................................................................................................... 5
Figure 2-3: 7707IT-3 Terminal Block Signal Connections ..................................................................................... 6
Figure 2-4: 7707IT-8 Terminal Block Signal Connections ..................................................................................... 7
Figure 2-5: Reproduction of Laser Certification and Identification Label ............................................................... 9
Figure 4-1: Location of Status Indicators and Jumpers ....................................................................................... 14
Figure 4-2: Card-edge Menu Quick Reference ................................................................................................... 16
Figure 5-1: General Purpose Inputs and Outputs ................................................................................................ 27
Figure 7-1: Control Tab ........................................................................................................................................ 31
Figure 7-2: Data Control Tab ............................................................................................................................... 33
Figure 7-3: Monitor Tab ....................................................................................................................................... 34
Figure 7-4: Faults Tab ......................................................................................................................................... 35
Tables
Figure 1-1: 7707IT Block Diagram ......................................................................................................................... 2
Figure 2-1: 7707IT Rear Panel .............................................................................................................................. 3
Figure 2-2: Terminal Block Wiring ......................................................................................................................... 5
Figure 2-3: 7707IT-3 Terminal Block Signal Connections ..................................................................................... 6
Figure 2-4: 7707IT-8 Terminal Block Signal Connections ..................................................................................... 7
Figure 2-5: Reproduction of Laser Certification and Identification Label ............................................................... 9
Figure 4-1: Location of Status Indicators and Jumpers ....................................................................................... 14
Figure 4-2: Card-edge Menu Quick Reference ................................................................................................... 16
Figure 5-1: General Purpose Inputs and Outputs ................................................................................................ 27
Figure 7-1: Control Tab ........................................................................................................................................ 31
Figure 7-2: Data Control Tab ............................................................................................................................... 33
Figure 7-3: Monitor Tab ....................................................................................................................................... 34
Figure 7-4: Faults Tab ......................................................................................................................................... 35
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7
REVISION HISTORY
REVISION DESCRIPTION DATE
0.1 Preliminary version Apr 2003
0.2 Corrected pinout of RS422 ports on Figure 3 May 2003
0.3 Added CARD ID Jumper Jul 2003
1.0 Updated signal connection drawing, first release of manual May 2004
1.1 VistaLINKTM Updates Sept 2004
1.2 Updated Rear Plate Diagrams Sept 2004
1.3 Updated safety section and added assembly and labeling sections Aug 2005
1.4 Added Terminal Block wiring diagram Nov 2007
1.5 Updated Bit Rate specifications. Added tables to section 4. Added
screen shots and information to VistaLINK® section. Jan 2009
1.6 Modified description for “Selecting the Card ID” in section 6.1. May 2009
1.7 Added information on serial data rate selection for TXMX profile March 2011
Information contained in this manual is believed to be accurate and reliable. However, Evertz assumes no responsibility for the use thereof nor for
the rights of third parties, which may be affected in any way by the use thereof. Any representations in this document concerning performance of
Evertz products are for informational use only and are not warranties of future performance, either expressed or implied. The only warranty
offered by Evertz in relation to this product is the Evertz standard limited warranty, stated in the sales contract or order confirmation form.
Although every attempt has been made to accurately describe the features, installation and operation of this product in this manual, no warranty
is granted nor liability assumed in relation to any errors or omissions unless specifically undertaken in the Evertz sales contract or order
confirmation. Information contained in this manual is periodically updated and changes will be incorporated into subsequent editions. If you
encounter an error, please notify Evertz Customer Service department. Evertz reserves the right, without notice or liability, to make changes in
equipment design or specifications.
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7
WARNING
Never look directly into an optical fiber. Non-reversible damage to the eye can
occur in a matter of milliseconds.
Do not hook up the 7707IT DWDM cards directly with a short fiber optic
cable. The 7707IT DWDM cards produce +7dBm of power, which will damage
the receiver if connected directly.
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7
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7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 1
1. OVERVIEW
The 7707IT series Intercom Fiber Transceivers extend multiple channels of intercom communication over
a single fiber optic link. The 7707IT-8 version accommodates eight channels of intercom, while the
7707IT-3 version accommodates three channels. Each channel is configurable as a matrix or party-line
and will interface with industry-standard intercom systems. Bi-directional analog audio, serial data, and
GPIO’s are conveniently presented in a single product. A pair of 7707IT Intercom Transceivers permits
communication over distances up to 50Km, with minimum possible latency.
Two optical interface configurations allow the user to choose the optimal function /price /performance ratio
to suit a particular application. The standard configuration transmits and receives over a single fiber. The
dual fiber configuration is compatible with CWDM & DWDM systems and is designed to transmit and
receive over separate fibers. The optical output of the 7707IT is available in 1310nm, 1550nm, CWDM &
DWDM wavelengths.
Features:
• Configurable interface to:
• RTS-Telex Matrix 4-Wire Audio, RS-485 Data, GPIO
• ClearCom Matrix 4-Wire Audio, RS-422 Data, GPIO
• RTS-Telex Party-Line 1-Wire Audio, GPIO
• ClearCom Party-line 1-Wire Audio, GPIO
• Multiple independent channels can simultaneously accommodate different intercom types.
• User-friendly selection of intercom interfaces via programmed profiles.
• All configuration settings are controllable through the card-edge user interface, or VistaLINK®.
• Comprehensive signal and status monitoring via four-digit card-edge display, or VistaLINK®.
• Unique self-calibration of party-line audio null levels.
• Provides 2 general-purpose inputs (GPI’s), and 2 general-purpose outputs (GPO’s).
• Selectable termination and failsafe bias settings for RS422/485 data inputs.
• Optical output wavelengths of 1310nm, 1550nm, and up to sixteen CWDM wavelengths
(ITU-T G.694.2 compliant).
• DWDM wavelengths also available (ITU-T G.694.1 compliant).
• Compatible with multi-mode and single-mode fiber (dual fiber version).
• Fully hot-swappable from front of frame.
• VistaLINK® enabled for remote monitoring and control when installed in 7700FR-C frame with
7700FC VistaLINK® Frame Controller.
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Page - 2 Revision 1.7
Fiber Type Fiber
Links Optical/Link
Budget
Transmit Side
Receive Side
Description
Ordering
Product Info
TX
Power
Ordering
Product Info
RX
Sensitivity
Multi-Mode 2 < 3km
7707IT13-3-F2
7707IT13-8-F2
-7dBm
7707IT13-3-F2
7707IT13-8-F2
-28dBm 1310nm on Tx & Rx fibers
Single-Mode 2 21dB/60km
7707IT13-3-F2
7707IT13-8-F2
-7dBm
7707IT13-3-F2
7707IT13-8-F2
-28dBm 1310nm on Tx & Rx fibers
Single-Mode 1 14dB/40km*
7707IT13-3
7707IT13-8
-10dBm
7707IT13-3
7707IT13-8
-24dBm
1310nm, bi-directional,
one fiber
Single-Mode 1(WDM) 25dB/71km
7707IT13M-3-W
7707IT13M-8-W
-1dBm
7707IT15M-3-W
7707IT15M-8-W
-26dBm
1310nm/1550nm, WDM,
bi-directional on one fiber
Single-Mode 1(CWDM) 24dB/96km** 7707ITxx-3-F2
7707ITxx-8-F2 0dBm 7707ITyy-3-F2
7707ITyy-8-F2 -28dBm
Different CWDM
wavelengths on Tx & Rx,
with 8 channel CWDM
Mux/Demux**
Single-Mode 1(DWDM) 30dB/120km** 7707ITDxxx-3-F2
7707ITDxxx-8-F2 +7dBm 7707ITDyyy-3-F2
7707ITDyyy-8-F2 -28dBm
Different DWDM
wavelengths on Tx & Rx,
with 8 channel DWDM
Mux/Demux**
*With >20dB return loss on fiber Interface Tx Power/Rx Sensitivity are nominal values ± 1dBm
**Assume 8 Ch CWDM Mux/Demux loss of 3.5dB Fiber Loss = 0.35/0.25dB per km @ 1310nm/1550nm
***Assumes 8Ch DWDM Mux/Demux loss of 5dB
Table 1-1: Typical Application Configurations
VistaLINK
®
Interface
Control/
Indication
DACAudio
Data
Audio
Data
ADC
Signal
Processing
Audio
3 or 8
Serial Data Inputs
3 or 8
Audio Inputs
2 GPI's
TDM
Mux
Aux
Aux
Fiber
Output
TDM
Demux
Partyline
Matrix
3 or 8
Serial Data Outputs
3 or 8
Audio Outputs
or Input/Outputs
2 GPO's
Optical
Transmitter
Optical
Receiver
Optical
Receiver
Fiber
Input
Fiber
Input/Output
(Single Fiber Version)
(Dual Fiber-F2 Version)
(Dual Fiber-F2 Version)
Local
Control
Local
Indication
Figure 1-1: 7707IT Block Diagram
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 3
2. INSTALLATION
The 7707IT series modules come with a companion rear plate that has multi-pin removable terminal block
connections, and an SC/PC (shown), ST/PC or FC/PC optical connector. For information on mounting the
rear plate and inserting the module into the frame see section 3 of the 7700FR chapter. The following
diagram shows four rear plate options.
Figure 2-1: 7707IT Rear Panel
2.1. OPTICAL CONNECTIONS
The 7707IT modules are designed to work with single-mode or multi-mode optical
fiber depending on the version ordered.
The CARD ID jumper must be configured in order to establish a robust optical link
between the two 7707IT modules. (See section 6.1)
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Page - 4 Revision 1.7
2.1.1. Single Fiber Versions
FIBER I/O: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical
input/output for the 7707IT-8 and 7707IT-3 (single fiber) versions. This connector should be
connected to the matching connector of a matching single fiber 7707IT module at the
destination end with a suitable fiber optic cable.
All single fiber versions of the 7707IT are designed to work with single-mode fiber optic
cable. Single fiber 7707IT-3 and 7707IT-8 versions use 1310nm wavelengths. Single fiber
7707IT-3-W and 7707IT-8-W versions use 1310nm or 1550nm wavelengths and have their
associated transmit wavelength marked on the rear panel.
2.1.2. Standard Dual Fiber Version (-F2 version)
FIBER IN: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical input to the
module. This connector should be connected to the FIBER OUT connector of a matching
dual fiber 7707IT-F2 module at the destination end with a suitable fiber optic cable. The
dual fiber 7707IT-F2 versions receive on wavelengths in the 1270 to 1610nm range
accommodating standard, CWDM or DWDM transmission schemes.
FIBER OUT: There is one SC/PC (shown), ST/PC or FC/PC female connector with the optical output
from the module. This optical output is available in 1310nm, 1550nm, and up to sixteen
CWDM wavelengths (ITU-T G.694.2 compliant). This connector should be connected to the
FIBER IN connector of a matching dual fiber 7707IT-F2 module at the destination end with a
suitable fiber optic cable. The dual fiber 7707IT-F2 versions transmit on the wavelength
marked on the rear panel and are designed to work with either single-mode fiber optic
cable. The dual fiber 7707IT-F2 versions are compatible with multi-mode fiber when
connected directly to a companion 7707IT-F2 module.
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 5
2.2. SIGNAL CONNECTIONS
Figure 2-2: Terminal Block Wiring
Simultaneously insert a signal wire (28-18 AWG) and use a screwdriver to secure it into the block as
shown in Figure 2-2. The screwdriver will push a tension clamp and will allow the insertion of the wire.
Wire positions correspond to detailed pin-outs as shown in Figure 2-4. Fasten screws to the rear plate at
the top and bottom once connected.
INTERCOM/AUDIO/DATA/GPIO: These multi-pin removable terminal blocks have the connections for
bi-directional analog intercom audio, bi-directional serial data and general purpose
input/outputs. The functions of some of the pins change with configuration. Please refer to the
pinout diagram shown in Figure 2-4.
Never apply a powered or “wet” party-line intercom signal to a terminal that is not
designated as a party-line connection.
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7707IT Multi-Channel Intercom Fiber Transceiver
Page - 6 Revision 1.7
Figure 2-3: 7707IT-3 Terminal Block Signal Connections
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 7
Figure 2-4: 7707IT-8 Terminal Block Signal Connections
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Page - 8 Revision 1.7
2.2.1. Audio Connections
+AUDIO IN: Positive balanced audio input. Usable only while the associated channel is
configured for use with matrix type intercom systems. This pin is DC coupled, and
should not be connected to a party-line type intercom system.
-AUDIO IN: Negative balanced audio input. Usable only while the associated channel is
configured for use with matrix type intercom systems. This pin is DC coupled, and
should not be connected to a party-line type intercom system.
+AUDIO OUT /PARTY-LINE: Positive balanced audio output, or party-line input/output. This pin is
AC coupled, and is always safe to connect to a party-line type intercom system,
regardless of card configuration. While the associated channel is configured for use
with matrix type intercom systems, this connection becomes one half of the
balanced audio output. While the associated channel is configured for use with
party-line type intercom systems, this connection becomes an unbalanced audio
input/output. While the associated channel is configured for use with party-line type
intercom systems, this connection also implements circuitry for the detection and
generation of call signals.
-AUDIO OUT: Negative balanced audio output. Usable only while the associated channel is
configured for use with matrix type intercom systems. This pin is DC coupled, and
should not be connected to a party-line type intercom system.
2.2.2. Data Connections
+RS485/+RS422 IN: Positive RS-422 input, or RS-485 input/output. When the associated channel is
configured for use with RTS-Telex matrix type intercom systems, this pin becomes
an RS-485 input/output. When the associated channel is configured for use with
ClearCom matrix type intercom systems or any party-line type intercom, this pin
becomes an RS-422 input.
-RS485/-RS422 IN: Negative RS-422 input, or RS-485 input/output. When the associated channel is
configured for use with RTS-Telex matrix type intercom systems, this pin becomes
an RS-485 input/output. When the associated channel is configured for use with
ClearCom matrix type intercom systems or any party-line type intercom, this pin
becomes an RS-422 input.
+RS422 OUT: Positive RS-422 output. The RS-422 interface is usable while the associated
channel is configured for use with ClearCom matrix type intercom systems or any
party-line type intercom system.
-RS422 OUT: Negative RS-422 output. The RS-422 interface is usable while the associated
channel is configured for use with ClearCom matrix type intercom systems or any
party-line type intercom system.
2.2.3. GPIO Connections
GPI1, GPI2: General purpose inputs to the 7707IT. See section 3.5 for electrical characteristics,
and section 0 for connection details.
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 9
GPO1, GPO2: General purpose outputs from the 7707IT. See section 3.4 for electrical
characteristics, and section 0 for connection details.
GPO COMMON: This is the common connection for the GPO contact closures. See section 0 for
connection details.
2.3. CARE AND HANDLING OF OPTICAL FIBER
2.3.1. Safety
!
CLASS 1 LASER PRODUCT
Background colour: yellow
Triangular band: black
Symbol: black
2.3.2. Assembly
Assembly or repair of the laser sub-module is done only at Evertz facility and performed only by qualified
Evertz technical personnel.
2.3.3. Labeling
Certification and Identification labels are combined into one label, as there is not enough room on the
product to place the label it is reproduced here in the manuals.
• There is no date of manufacture on this label as it can be traced by the bar code label placed on
the Printed circuit board of each Evertz plug-in module
• The Model number is one of: 7707IT13-3, 7707IT13M-3-W, 7707IT15-3-W, 7707IT13-3-F2,
7707IT13-8, 7707IT13M-8-W, 7707IT15-8-W, 7707IT13-8-F2
7707ITxx, (xx = 27, 29, 31, 33, 35, 37, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61)
7707ITDyyy (Dyyy represents ITU Grid Channel: D200, D210, D220, D230, D240, D250, D260,
D270, D280, D290, D300, D310, D320, D330, D340, D350, D360, D370, D380, D390, D400,
D410, D420, D430, D440, D450, D460, D470, D480, D490, D500, D510, D520, D530, D540,
D550, D570, D580, D590, D600)
Figure 2-5: Reproduction of Laser Certification and Identification Label
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Page - 10 Revision 1.7
2.3.4. Handling and Connecting Fibers
Never touch the end face of an optical fiber. Always keep dust caps on optical fiber
connectors when not connected and always remember to properly clean the optical
end face of a connector before making a connection.
The transmission characteristics of the fiber are dependent on the shape of the optical core and therefore
care must be taken to prevent fiber damage due to heavy objects or abrupt fiber bending. Evertz
recommends that you maintain a minimum bending radius of 5 cm to avoid fiber-bending loss that will
decrease the maximum attainable distance of the fiber cable. The Evertz fiber optic modules come with
cable lockout devices, to prevent the user from damaging the fiber by installing a module into a slot in the
frame that does not have a suitable I/O module. For further information about care and handling of fiber
optic cable see section 3 of the Fiber Optics System Design section of this manual binder.
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 11
3. SPECIFICATIONS
3.1. ANALOG AUDIO
3.1.1. Balanced/Matrix Type Audio
Number of Signals:
7707IT-8: 8 Inputs, 8 Outputs
7707IT-3: 3 Inputs, 3 Outputs
Type: Analog Audio, Balanced
Connector Type: Multi-pin Removable Terminal Block
Input Impedance: > 10KΩ
Output Impedance: 66Ω
Signal Resolution: 24-Bits
Sampling Rate: 52.7KHz
Frequency Response: 20Hz to 20KHz
Gain Flatness: ± 2dB
Input Level (max): +20dBu
Output Level (max):
Into 10KΩ: +20dBu
Into 600Ω: +19dBu
Signal/Noise Ratio: > 90dB
THD @1KHz: < 0.01%
Crosstalk: < -80dB
Controllable Gain: -10dB to +10dB
3.1.2. Unbalanced/Party-Line Type Audio
Number of Signals:
7707IT-8: 8 Inputs, 8 Outputs
7707IT-3: 3 Inputs, 3 Outputs
Type: Analog Audio, Full-duplex, Unbalanced
Connector Type: Multi-pin Removable Terminal Block
Signal Coupling: AC coupled (accommodates 30V ‘wet’ inputs)
Bridging Impedance: >10KΩ
Signal Resolution: 24-Bit
Sampling Rate: 52.7KHz
Sidetone Null: > 25dB
Sidetone Null Range: 100Ω to 300Ω load
Frequency Response: 120Hz to 20KHz
Gain Flatness: ± 2dB
Input Level (max): +5dBu
Output Level (max): +5dBu (into 200Ω load)
Signal/Noise Ratio: > 75dB
THD @1KHz: < 0.1%
Crosstalk: < -60dB
Controllable Gain: -5dB to +5dB (into 200Ω load)
Receive Signaling: 4VDCmin (ClearCom), 20KHz ±500Hz (RTS)
Send Signaling: 11VDCmin (ClearCom), 20KHz ±100Hz (RTS)
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Page - 12 Revision 1.7
3.2. SERIAL DATA
Number of Signals:
7707IT-8: 8 Inputs, 8 Outputs
7707IT-3: 3 Inputs, 3 Outputs
Connector at Breakout: Multi-pin Removable Terminal Block
Signal Type: RS-485 or RS-422 (selectable)
Input Termination: 120Ω or Open (selectable)
Input Failsafe Bias: 200mV (3.3mA into 60Ω) or None (selectable)
Bit Rate (max): 460Kb/s
3.3. OPTICAL INPUT/OUTPUT
Connector:
Single Fiber version: 1 Bi-directional optical connector: SC/PC, ST/PC or FC/PC female
housing
Dual Fiber (F2) version: 2 optical connector: SC/PC, ST/PC or FC/PC female housing
Maximum Input Power:
Single fiber versions: 0 dBm
Dual fiber (F2) versions: 0 dBm
Input Optical Sensitivity:
Single fiber versions: -24 dBm
Single fiber (W) versions: -26 dBm
Dual fiber (F2) versions: -28 dBm
Fiber Size and Type:
Single Fiber versions: 9 µm core / single mode
Dual Fiber (F2) versions: 9 µm core / single-mode on TX, 62.5 µm core / multi-mode on RX
Output Wavelengths:
Standard: 1310nm, 1550nm (nominal)
CWDM: 1270nm to 1610nm (ITU-T G.694.2 compliant).
DWDM: 1530nm to 1560nm (ITU-T G.694.1 compliant).
Output Power:
Single fiber version:
1310nm FP (Standard): -10 dBm ±1dBm
1310 & 1550 (W Versions): -1 dBm ±1dBm
Dual fiber version:
1310nm FP (Standard): -7 dBm ±1dBm
CWDM DFB: 0 dBm ±1dBm
DWDM DFB: +7 dBm ±1dBm
3.4. GENERAL PURPOSE OUPUTS (GPO)
Number of Signals: 2 GPO Outputs, 1 Common Reference (GPO COMMON)
Connector at Breakout: Multi-pin Removable Terminal Block
Output Type: Dry contact relay closure to GPO COMMON, normally open
Output Current (min): 100mA
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Revision 1.7 Page - 13
3.5. GENERAL PURPOSE INPUTS (GPI)
Number of Signals: 2 Inputs
Connector at Breakout: Multi-pin Removable Terminal Block
Type: Opto-isolated, Active low
Input Voltage:
Safe Voltage Range: -20V to +10V
Off Condition (min): +3.5V
On Condition (max): +2.5V(active low)
Input Current (min): 1mA
Input Current (max): 10mA(internally limited)
3.6. ELECTRICAL
Voltage: 12V DC
Power (max): 24 Watts
EMI/RFI: Complies with FCC regulations for class A devices
Complies with EU EMC directive
3.7. PHYSICAL
7700 Frame Mounting:
Number of Slots:
7707IT-8: 2
7707IT-3: 1
7701 Frame Mounting:
Number of Slots:
7707IT-8: 1
7707IT-3: 1
7700 MultiFrame Manual
7707IT Multi-Channel Intercom Fiber Transceiver
Page - 14 Revision 1.7
4. CARD-EDGE MONITORING AND CONTROL
The 7707IT has one LED status indicator per channel and a 4-digit dot-matrix display on the front card-
edge to show operational status of the card at a glance. The card-edge pushbutton and toggle switch are
used to select various indications to the dot-matrix display and LED’s. Figure 4-1 shows the locations of
the indicators and pushbutton.
FRAME STATUS
ON/OFF
/ MODULE OK
LOCAL FAULT
CH:01
SERIAL
RUN/UPGRADE
SERIAL
CH:02
CH:03
CH:04
CH:05
CH:06
CH:07
CH:08
7707IT-8
Only
CARD ID
A/ B
Figure 4-1: Location of Status Indicators and Jumpers
4.1. STATUS INDICATOR LEDS
LOCAL FAULT: This red LED indicates poor module health. Three conditions could cause this fault
indication to be active: A link with a companion 7707IT has not been achieved,
operation of the output laser is erroneous, or if a card power fault exists (i.e. a
blown fuse). If a link is not maintained between two companion 7707IT cards, refer
to section 6.1, and verify the selection of the CARD ID jumper. The LOCAL FAULT
indication can also be reported to the frame by setting the FRAME STATUS jumper.
MODULE OK: This green LED indicates good module health. It will be on while a link is maintained
with a companion 7707IT, the output laser is operating properly, and the card power
is good.
CH:01 to CH:08: These green LED’s indicate the signal status of the respective intercom channels.
Selectable modes accommodate discrete signal presence indication of input audio,
output audio, input data, or output data. Presence of audio, data, input, and output
signals may also be combined to the LED of the respective channel. Selectable
modes of signal status indication are described in section 4.2 of this manual.
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